Alert archive / Arizona / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 9, NWS Flagstaff, AZ

August 5, 1990Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 5, 1990, 4:38 PM MST for Yavapai County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 5, 1990, 4:38 PM MST (23:38 UTC)
Expired
Aug 5, 1990, 6:45 PM MST
In force
2 hr
Issued by
NWS Flagstaff, AZ
Area
Whole counties

County Yavapai County, AZ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Winslow (Autob), AZ (KINW), launched 12:00Z, 11.6 hours before the alert went out and 176 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Winslow (Autob), AZ at 12:00Z on 1990-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Winslow (Autob), AZ at 12:00Z on 1990-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
151 J/kg
Mixed-layer CIN
-282 J/kg
Mixed-layer LCL
2298 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPHX 052348
SVRPHX
AZC013-025-060145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
438 PM MST SUN AUG 5 1990
 
THE NATIONAL WEATHER SERVICE IN PHOENIX ARIZONA HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  645 PM MST
FOR THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL ARIZONA
 
   ...NORTHWESTERN MARICOPA COUNTY...INCLUDING THE CITIES OF
WICKENBURG...AGUILA...AND MORRISTOWN ALONG HIGHWAYS 93/89 AND 60.
 
IN WEST CENTRAL ARIZONA
 
   ...SOUTHWESTERN YAVAPAI COUNTY ...INCLUDING BAGDAD...CONGRESS
AND STRETCHES OF HIGHWAY 93 FROM WIKIEUP TO WICKENBURG..
 
AT 430 PM A LINE OF THUNDERSTORMS WAS DESCENDING OUT OF THE MOUNTAINS
SOUTHWEST TOWARDS STRETCHES OF HIGHWAY 93...89...AND 60 WHICH INCLUDE
THE TOWNS OD WICKENBURG...MORRISTOWN...BAGDAD...AND AGUILA.
 
THESE THUNDERSTORMS ARE STRONG ENOUGH TO PRODUCE WINDS IN EXCESS OF 60
MPH...INTENSE RAINFALL...AND HAIL.  SOME OF THE WASHES IN THE AREA...
ESPECIALLY THOSE THROUGH WICKENBURG... COULD RISE RAPIDLY AFTER A HEAVRAIN.
 
THIS COULD BE A DANGEROUS STORM THAT MAY STRIKE SUDDENLY.  THE COMBINESEVERE THUNDERSTORM AND FLASH FLOODING WARNING IS POSTED UNTIL 645 PM.
 
SEVERE THUNDERSTORMS CAUSE DAMAGING WINDS...LARGE HAIL AND DEADLY
LIGHTNING. MOVE INSIDE A REINFORCED BUILDING OR STORM SHELTER. GO TO
AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM
WINDOWS.
 
MOBILE /HOMES ARE IN DANGER FROM SEVERE THUNDERSTORM WINDS...
ESPECIALLY IF THEY HAVE NOT BEEN TIED DOWN. FOR YOUR SAFETY...TAKE
SHELTER IN A STRONG BUILDING. IF YOUR TRAILER PARK HAS A STORM
SHELTER...USE IT.
 
VASQUEZ

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 4:38 PM MSTSevere Thunderstorm WarningFGZMaricopa2 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.